Under Shingle Roof Vents

Perhaps the most expensive solution is shown here.

Under shingle roof vents.

These vents are static vents that are placed over holes in the roof close to the roof ridge. To install the vent the roofer slips the flange the metal lip of the vent under shingles at the upper part of the hole and rests the flange on top of the shingles at the down slope part of the hole. A lot of work and best if combined with a new roof. Smartvent can be installed under virtually any shingle course when proper installation techniques are used.

Use of ridge or off ridge exhaust vents is required. Residential and commercial roofing shingles slate roof ventilation roof underlayments asphaltic and tpo roof membranes. Back to shingle vents in a minute. Unlike box vents which are square off ridge vents are usually much longer and thinner.

Install shingles as normal up to the base of the plumbing vent. Imo low shingle vents or edge vents will be vulnerable to ice dams which as you probably know can show up even with the best roof insulating installs. Installing a roof plumbing vent is typically an easier task than flashing a chimney. They let moisture and hot air exit the attic but they aren t nearly as effective as other types of roof vents and homes generally need to have several of these units for the best results.

This is a very complicated assembly which should be attempted only by seasoned builders. There is no maximum slope installation. Place the flashing or boot onto the plumbing vent so the base is resting on shingles. It s a roof top installed shingle over intake vent that can be used to supplement existing soffit or undereave vents.

My roof has had 12 soffits so not as challenged as yours but i added 4 to my siding for exterior foam insulation and didn t want to reduce my soffit size so i extended most of my rafters to get back to 12 and 18 on my dust pan in back. Smartvent is nail gunnable. Insulating over the roof. This aluminum cap is the finished product and does not require additional asphalt shingle ridge caps.

Along the soffit edge of the roof or the facing edge of dormer rakes and goes virtually unnoticed. Momentarily lift the boot and apply sealant to hold the flashing in place. An aluminum ridge vent has a mushroom shaped profile combined with a wide flange on both sides that sits on top of the roof shingles. It allows air to flow freely through the 1 roof decking slit providing more than adequate soffit ventilation to maximize ridge vent effectiveness.

Certainteed ridge vent combined with sufficient intake vents such as certainteed intake vent are the most efficient and effective systems you can install. An array of vertical 2 4 spacers creates vent channels over the foam and under the new plywood sheathing a second roof deck to which the new roofing will be nailed. Smartvent should be installed on shingled roofs with a minimum 4 12 pitch. The ridge of the roof is prepared similarly for both types of ridge vent.